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The detection of fluorescence radiation produced in the atmosphere by the extensive air showers (EAS) generated by the interaction of incoming ultra high energy cosmic rays (UHECR) with the air molecules, is a technique that is being used by several experiments like Hires and Auger. This emission results from the radiative de-excitation of the N2C3Πu and N2+B2Σu+ molecular states (2P and 1N systems,...
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